浏览器通常不能理解或支持图像编码中”点每英寸”（DPI）的计量单位，而总是以96 dpi分辨率来显示图像。
The browser does not typically understand or honor dots-per-inch (DPI) encoded in images and will always render images in the browser at a 96 dpi resolution.
具体的转换方式有三种：码率转换、分辨率转换、编码制式的转换。
Videotranscoding has three means: code rate conversion, resolution conversion, conversion between coding standard.
采用高分辨率的增量式光电编码器和相应的硬件接口电路，实现了变磁阻电机转子在定子两个齿之间位移的检测。
Using an optical incremental encoder and hardware interface, the position of the motor rotor between the two teeth of the motor stator is measured.
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